Omega Seamaster Diver 300 Master Chronometer Nekton EditionIn line with the brands deep connection to the sea, OMEGA is a proud partner to Nekton, a not for profit research foundation committed to the protection and management of the worlds oceans. This 42 mm Seamaster Diver 300M, released in support of Nekton, has a polished brushed stainless steel case and laser ablated black ceramic [ZrO2] dial, matt finished with polished waves in positive relief. The uni directional rotating bezel is in grade 5 titanium